Generation of an X-ray image of an object using a counting X-ray detector is provided. The X-ray detector includes detector modules that may be aligned adjacent to one another. Each of the detector modules is subdivided into a matrix having a plurality of pixels. The detector modules are arranged adjacent to one another on a common substrate. A sensor surface formed by the detector modules has a uniform matrix structure having a constant pixel pitch. At least one missing pixel is arranged within the sensor surface. Raw image data is acquired by a portion of the detector modules of the X-ray detector, the acquired raw image data is at least partially corrected, and further raw image data is calculated for the at least one missing pixel using the corrected raw image data. The X-ray image is calculated based on the corrected raw image data and the further raw image data.
